18890840

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2447}}^1$

素因数の和:2651

約数の個数: 32

約数和(自身を含む): 42742080

約数和(自身を除く): 23851240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2447, 3860, 4894, 7720, 9788, 12235, 19576, 24470, 48940, 97880, 472271, 944542, 1889084, 2361355, 3778168, 4722710, 9445420, 18890840]

約数ペア:

[(1, 18890840), (2, 9445420), (4, 4722710), (5, 3778168), (8, 2361355), (10, 1889084), (20, 944542), (40, 472271), (193, 97880), (386, 48940), (772, 24470), (965, 19576), (1544, 12235), (1930, 9788), (2447, 7720), (3860, 4894)]